mainstay
US /ˈmeɪn.steɪ/
UK /ˈmeɪn.steɪ/
名詞
支柱
the most important part of something, providing support for everything else:
範例:
•
In the early 1900s, farming was the mainstay of the national economy.
支柱
the most important part of something, providing support for everything else: